The interesting component built into the Muve is the fact that after a pre-determined amount of time, the accelerometer will emit a differnt color and vibrate to prompt you to get up and move around. I'm not sure if the device measures how long you take a break from being sedentary - I would assume so, b/c I could see people getting up for minute and jumping around just so they could get back to work. I also assume that when the Muve lights up RED that its time to move and if its GREEN you don't have to move. I would love to try one out before it's release ... supposedly on March 23, 2009 - but I haven't seen a press release for it yet. I'll keep you informed.
For more information on devices that measure physical activity and please see these posts: accelerometers or FitBit or GoWear Fit.
Here are more images of the Muve device.
The Gruve Solution includes the following:
Gruve - Your personalized, real time activity monitor
Gruve Online - The online resource which stores your data and provides education, motivation and support
Gruve Guide - The 12 week program that teaches and leads you toward a healthier, active lifestyle
Gruve with a ONE YEAR online subscription $300
Gruve with a TWO YEAR online subscription $460